Hands On Halo 3: ODST Firefight Co-Op Mode
Described as yet another knock-off of Gears of War 2's Horde mode, the four-player Firefight mode in Halo 3: ODST looks to follow in the footsteps of Call of Duty: World at War, Left 4 Dead, and more top-tier shooter games that use co-op survival scenarios to extend their replay value.